I ran some benchmarks to get a feel of the SU3500 raw power. Running SuperPI took 15 seconds for the 512K calculation, 36 seconds for the 1M calculation.
Atom N270 83 seconds
Intel SU3500 36 seconds
Intel P8600 21 seconds
For comparisons to your favorite CPUs have a look here.
Passmark Performance Test 7, an overall performance benchmark delivered a 358 points Passmark Performance Rating. That's a lot more than Atom based netbooks that score around 200.
Acer 1810T - 358
Acer 751 (Atom z520) - 165
Asus 1000HE (Atom N270) - 235
Sony TT (SU9300)- 360
The Passmark CPU Mark for the SU3500 was 490.
Intel Atom N270 (1.60GHz) - 306
Intel Pentium M (2.00GHz) - 497
Intel C2D U7600 (1.20GHz) - 729
Intel C2D T5250 (1.50GHz) - 793
For comparison, here's the complete list of other CPUs. This list isn't 100% accurate though, as you can see by their rating of the SU3500.
Here's the Windows Experience Index, which can easily compared to your current Windows system.
Wprime 32M was completed in 108 seconds. Running HD Tune for the hard drive delivered no surprises. The single platter Western Digital Scorpio Blue works relatively fast, quiet and without vibration.
To test the game performance Doom 3 Timedemo 1 was run. In 640x480 resolution and medium quality 12.5 fps were displayed. In high quality the score was 11.6 fps.